dummyHook's fields were concurrently written by nodes and read by the test. The simplest solution is to protect all fields with a mutex. Enable: TestMultiplePeersDropSelf, TestMultiplePeersDropOther as they seemingly accidentally stayed disabled during a refactor/rewrite since 1836366ac19e30f157570e61342fae53bc6c8a57. resolves ethersphere/go-ethereum#1286